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Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking
Yang, Wenshen1; Sun, Weina1,2; Zhao, Shuheng1,2; Yin, Xiuli1
2016
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
Volume219Pages:87-92
AbstractSingle-walled carbon nanotubes (SWNTs) were prepared in the channels of small AlPO4-5 and cobalt-incorporated AlPO4-5 (CoAPO-5) crystals (4-6 mu m in diameter and 10-30 mu m in length), by hydrocracking at 350 degrees C. The effects of Co content in the precursor gel and carbon density of the structure-directing agent on the resulting SWNTs were investigated. The results of high-resolution transmission electron microscopy and polarized Raman scattering indicated that SWNTs formed in the channels of AlPO4-5 and CoAPO-5 crystals, after hydrocracking for 10 h at 350 degrees C. The SWNTs were 0.4 nm in diameter, and possessed well-defined symmetry. When the Co/Al ratio of the precursor gel was 0.075, the relative intensity ratio of Raman D to G band (ID/IG) was 0.286, and the weight loss (500-700 C) of the SWNTs formed in CoAPo-5 was 3.27 wt%. This Co/Al ratio yielded the lowest obtained I-D/I-G value and the highest weight loss of SWNTs, which indicated the lowest amorphous carbon density and the highest SWNT quantity. The density and quantity of SWNTs in the AlPO4-5 crystals increased when the structure-directing agent was changed from triethylamine to tripropylamine, because of the higher carbon content of the latter's unit cell. Low-temperature hydrocracking can be used to prepare SWNTs in the channels of AlPO4-5 and CoAPO-5 crystals, even for small low-quality crystals. (C) 2015 Elsevier Inc. All rights reserved.
SubtypeArticle
KeywordSingle-walled Carbon Nanotubes Hydrocracking Coapo-5 Crystals Radial Breathing Mode Co/al Ratio
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.micromeso.2015.06.036
WOS Subject ExtendedChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordCHANNELS ; CRYSTALS ; GROWTH ; DECOMPOSITION ; MECHANISM ; TEMPLATE
Indexed BySCI
Language英语
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000363353800012
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10880
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang, Wenshen,Sun, Weina,Zhao, Shuheng,et al. Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2016,219:87-92.
APA Yang, Wenshen,Sun, Weina,Zhao, Shuheng,&Yin, Xiuli.(2016).Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking.MICROPOROUS AND MESOPOROUS MATERIALS,219,87-92.
MLA Yang, Wenshen,et al."Single-walled carbon nanotubes prepared in small AlPO4-5 and CoAPO-5 molecular sieves by low-temperature hydrocracking".MICROPOROUS AND MESOPOROUS MATERIALS 219(2016):87-92.
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